Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Unlearn OOP (if you want to learn FP)
Search
Uberto Barbini
November 29, 2019
Programming
0
310
Unlearn OOP (if you want to learn FP)
Keynote at the Italian Kolin Community Conference 2019
Uberto Barbini
November 29, 2019
Tweet
Share
More Decks by Uberto Barbini
See All by Uberto Barbini
Earthquake and Kominka
ramtop
0
190
Let's Put the Fun Back in Functional Programming
ramtop
0
160
Error Handling and Logging in a Functional World
ramtop
0
720
Future Java: Project Valhalla LW2
ramtop
0
110
Quarkus.io + Kotlin = Supersonic Kotlin
ramtop
0
350
Microservices From The Trenches
ramtop
1
120
4 Rules of Simple Design in Functional Programming
ramtop
0
76
4 Rules of Simple Design in Functional Programming
ramtop
1
1.2k
Project Valhalla and Value Types
ramtop
0
340
Other Decks in Programming
See All in Programming
Team operations that are not burdened by SRE
kazatohiei
1
210
Julia という言語について (FP in Julia « SIDE: F ») for 関数型まつり2025
antimon2
3
980
ReadMoreTextView
fornewid
1
480
来たるべき 8.0 に備えて React 19 新機能と React Router 固有機能の取捨選択とすり合わせを考える
oukayuka
2
850
生成AIで日々のエラー調査を進めたい
yuyaabo
0
650
第9回 情シス転職ミートアップ 株式会社IVRy(アイブリー)の紹介
ivry_presentationmaterials
1
240
A2A プロトコルを試してみる
azukiazusa1
2
1.1k
設計やレビューに悩んでいるPHPerに贈る、クリーンなオブジェクト設計の指針たち
panda_program
6
1.4k
Java on Azure で LangGraph!
kohei3110
0
170
XSLTで作るBrainfuck処理系
makki_d
0
210
Team topologies and the microservice architecture: a synergistic relationship
cer
PRO
0
1k
童醫院敏捷轉型的實踐經驗
cclai999
0
190
Featured
See All Featured
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
7
700
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
5
210
BBQ
matthewcrist
89
9.7k
Six Lessons from altMBA
skipperchong
28
3.8k
It's Worth the Effort
3n
185
28k
The Pragmatic Product Professional
lauravandoore
35
6.7k
Code Reviewing Like a Champion
maltzj
524
40k
Visualization
eitanlees
146
16k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
Rebuilding a faster, lazier Slack
samanthasiow
82
9.1k
Docker and Python
trallard
44
3.4k
Writing Fast Ruby
sferik
628
61k
Transcript
Unlearn Object Oriented Programming (if you want to learn Functional
Programming) Uberto Barbini ramtop @
When I was a kid I wanted to become a
Naturalist
I kept reading books about Natural Sciences
I kept reading books about Natural Sciences
I kept reading books about Natural Sciences
Classification was simple...
Then Cladistic arrived... Common ancestors
And birds became dinosaurs!
We are all fish, technically
Scientists are humans...
None
https://pixabay.com/users/endriqstudio-13819715/ https://pixabay.com/users/endriqstudio-13819715/
It’s not easy to Unlearn
None
https://pixabay.com/users/sasint-3639875/ https://pixabay.com/users/sasint-3639875/ Object Oriented vs Functional
None
None
None
None
None
None
Thou Shalt Have No Manager Class
None
None
None
None
None
Credits https://pixabay.com/users/sasint-3639875/ Credits https://pixabay.com/users/sasint-3639875/ The Elephant in the room
None
Object-Oriented Functional
Url Shortener
Url Shortener
Unlearn What seems What seems wrong wrong but it’s but
it’s right right? ? What seems What seems right right but it’s but it’s wrong wrong? ?
None
Well Defined Types
None
Generics are Type builders
None
Anemic Objects Immutable Data
None
Don’t use Exceptions as result
None
Side effects should be left out
None
Function types instead of Interfaces
None
Which Language or Library should I use?
The ones that spark joy!
Where should I start in an existing Legacy Project?
https://pixabay.com/users/1588877-1588877/ Small changes
None
Unlearn is difficult Functional Programming is made of Arrows Look
at your code with new eyes (plus we are fish)
Excuses to avoid learning FP: It’s just a bunch of
funny words I don’t have time What’s the point?
Tell me your Questions! Uberto Barbini @ramtop Blog https://medium.com/@ramtop Book:
https://tinyurl.com/funkotlinbook